What is the meaning of swing bridge?
Word forms: plural swing bridges. countable noun. A swing bridge is a low bridge that can be opened either in the middle or on one side in order to let ships pass through.
How does swing bridge work?
A swing span bridge rotates in a horizontal plane around a vertical axis into a position parallel with the marine channel and shore, allowing boats and ships to pass along a waterway that would otherwise be obstructed by the bridge. Swing bridges are rotated by a series of gear sets and a rack-and-pinion drive.
What are swinging bridges called?
A simple suspension bridge (also rope bridge, swing bridge (in New Zealand), suspended bridge, hanging bridge and catenary bridge) is a primitive type of bridge in which the deck of the bridge lies on two parallel load-bearing cables that are anchored at either end.
How many swing bridges are left in the United States?
The database currently contains a total of 321 structures in this category.
What is a double swing bridge?
“Double swing” bridges have two swinging or swiveling sections. The George P. Coleman Memorial Bridge running between Yorktown and Gloucester Point in Virginia, USA was built in 1952 and widened in 1995. The largest swing span bridge in the world is Pyrmont Bridge spanning Darling Harbor in Australia.
What are the disadvantages of Bascule Bridge?
Disadvantages of Bascule Bridge
- Bascule bridge is subjected to considerable wind load especially when it is opened.
- The machinery used to control bascule bridge should be crucially strong and robust compared to the case where wind load is not present.
Who invented swing bridges?
Armstrong is undoubtedly most famous locally for the Swing Bridge, which he invented and subsidised. Armstrong’s business, Elswick Works, employed over 25,000 people, making everything from hydraulic machinery to ammunition, field guns and warships.
What does swing bridge mean in nautical terms?
› a bridge that can be turned to a position that is at 90° to its usual position, so that ships can go through.
What kind of support does a swing bridge have?
A swing bridge is a movable bridge that has as its primary structural support a vertical locating pin and support ring, usually at or near to its center of gravity, about which the turning span can then pivot horizontally as shown in the animated illustration to the right.
Which is the longest swing bridge in the world?
It is left open most of the time to allow sailing ships to pass in the canal, only closing during the passage of trains. The longest swing bridge span is 340 metres, by the El Ferdan Railway Bridge across the Suez Canal.
Is there a swing bridge in Portland Oregon?
BNSF Railway bridge across the Columbia River in Portland, Oregon, showing the swing-span section turning. As this type requires no counterweights, the complete weight is significantly reduced as compared to other moveable bridges.